Q. Which of the following amino acids are rarely present in alpha helix Glycine and proline Proline and tryptophan Tryptophan and glycine Proline only Answer: Glycine and proline
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Q. All the statements regarding peptide bond are true except Peptide bond is a co-valent bond Peptide bond is rigid and planar Peptide bond has partial double bond character Peptide bond is formed by non-condensation reaction Answer: Peptide bond is formed by non-condensation reaction
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Q. How many small peptides are formed upon cleavage by trypsin if a protein has 5 lysine residues 4 5 6 7 Answer: 6
Q. Desmosine is an unusual amino acid found in Myosin Troponin Actin Elastin Answer: Elastin
Q. Which of the following amino acid has pKa near neutrality Tryptophan Arginine Histidine Asparagine Answer: Histidine
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Q. Which of the following interaction contributes most in protein folding Covalent bond Ionic bond Hydrophobic interaction Vander walls interaction Answer: Hydrophobic interaction
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Q. The formation of cystine occurs at ER Golgi Cytosol Mitochondria Answer: ER
Q. The characteristic strong absorbance of 280nm of proteins is due to All amino acids can absorb at 280nm Only Tryptophan and tyrosine can absorb at 280 nm Tryptophan is responsible for the absorbance Tryptophan, tyrosine and phenylalanine can absorb at 280 nm Answer: Tryptophan, tyrosine and phenylalanine can absorb at 280 nm
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